S6E18 · Suicide Squad

Complete story — includes the ending

To expose Kelly's crimes, Jake recruits the Vulture, C.J., and Madeline Wuntch to stage a kidnapping and bug Kelly. The plan falls apart due to the Vulture and C.J.'s ineptitude and Holt's distrust of Wuntch. Wuntch seemingly betrays the team to Kelly and has them all arrested, but it's later revealed to be a ruse by Jake so she could get access to Kelly's phone. Kelly is suspended and Wuntch becomes acting commissioner until they can find a replacement. As this is going on, Terry is in denial over getting transferred to Staten Island, until Wuntch uses her temporary position to alter the budget and allow Terry to stay at the Nine-Nine. However, because Holt inadvertently revealed to Wuntch that he only spent a month as a uniformed patrolman before becoming a detective, which is in breach of NYPD rules, she forces him back into uniform to make up for his missing time.